Neither Heidenhain’s AZAN trichrome nor the expression of Tenascin C (TnC), a sensitive marker for tissue repair in ARVC hearts [64], differed between the majority of wild-type and Dsg20/wt hearts (Figure 2A,B,D,E and Supplemental Figure S2). Here, TNC is linked to arrhythmogenic right ventricular cardiomyopathy.